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发明名称
Phonographic apparatus
摘要
申请公布号
US2307030(A)
申请公布日期
1943.01.05
申请号
US19410375750
申请日期
1941.01.24
申请人
JOSEPH ERWOOD
发明人
ERWOOD JOSEPH
分类号
G11B17/16
主分类号
G11B17/16
代理机构
代理人
主权项
地址
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